return {
  'simrat39/symbols-outline.nvim',
  config = function ()
   -- symbol-outline
   -- shift + k 查看预览 (预览很不靠谱...会预览到错误的位置,不知道以后会不会修复)
   -- 可自定义设置
   local opts = {
     highlight_hovered_item = true,
     show_guides = true,
     auto_preview = false,
     position = 'right',
     relative_width = true,
     width = 25,
     auto_close = false,
     show_numbers = false,
     show_relative_numbers = true,
     show_symbol_details = true,
     preview_bg_highlight = 'Pmenu',
     autofold_depth = nil,
     auto_unfold_hover = true,
     fold_markers = { '', '' },
     wrap = true,
     keymaps = { -- These keymaps can be a string or a table for multiple keys
       close = {"<Esc>", "q"},
       goto_location = "<Cr>",
       focus_location = "o",
       hover_symbol = "<C-space>",
       toggle_preview = "K",
       rename_symbol = "r",
       code_actions = "a",
       --设置成与treesitter折叠一致
       --fold = "h",
       --unfold = "l",
       fold = "zc",
       unfold = "zo",
       fold_all = "W",
       unfold_all = "E",
       fold_reset = "R",
     },
     lsp_blacklist = {},
     symbol_blacklist = {},
     symbols = {
       File = {icon = "", hl = "TSURI"},
       Module = {icon = "", hl = "TSNamespace"},
       Namespace = {icon = "", hl = "TSNamespace"},
       Package = {icon = "", hl = "TSNamespace"},
       Class = {icon = "𝓒", hl = "TSType"},
       Method = {icon = "ƒ", hl = "TSMethod"},
       Property = {icon = "", hl = "TSMethod"},
       Field = {icon = "", hl = "TSField"},
       Constructor = {icon = "", hl = "TSConstructor"},
       Enum = {icon = "ℰ", hl = "TSType"},
       Interface = {icon = "ﰮ", hl = "TSType"},
       Function = {icon = "", hl = "TSFunction"},
       Variable = {icon = "", hl = "TSConstant"},
       Constant = {icon = "", hl = "TSConstant"},
       String = {icon = "𝓐", hl = "TSString"},
       Number = {icon = "#", hl = "TSNumber"},
       Boolean = {icon = "⊨", hl = "TSBoolean"},
       Array = {icon = "", hl = "TSConstant"},
       Object = {icon = "⦿", hl = "TSType"},
       Key = {icon = "🔐", hl = "TSType"},
       Null = {icon = "NULL", hl = "TSType"},
       EnumMember = {icon = "", hl = "TSField"},
       Struct = {icon = "𝓢", hl = "TSType"},
       Event = {icon = "🗲", hl = "TSType"},
       Operator = {icon = "+", hl = "TSOperator"},
       TypeParameter = {icon = "𝙏", hl = "TSParameter"}
     },
     option = {
       --theme = "nightfox",
       theme = "duskfox",
     }
   }
   require("symbols-outline").setup(opts)

   -- 默认设置
   --require("symbols-outline").setup()

   -- 快捷键设置
   vim.api.nvim_set_keymap('n', '<F3>', ':SymbolsOutline<CR>', {noremap = true, silent = true})
   --vim.api.nvim_set_keymap('n', '<F3>', ':SymbolsOutlineOpen<CR>', {noremap = true, silent = true})
   --vim.api.nvim_set_keymap('n', '<F3>', ':SymbolsOutlineClose<CR>', {noremap = true, silent = true})
  end
}
